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Acid value rapid test paper and detection method thereof

A test strip and quick test technology, which is applied in the direction of chemical reaction of materials and material analysis by observing the influence of chemical indicators, can solve the problems of high professional requirements and cumbersome operators, and save detection. effect of time

Pending Publication Date: 2020-06-16
云南商测质量检验技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing GB5009.229-2016, three methods of cold solvent titration, potentiometric titration and hot ethanol titration are used to detect the acid value in food. Test kits, but no matter which method and product are required to obtain results by cumbersome titration and calculation, the professional requirements of the operator are high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Soaking solution: Take 0.01-2g of methyl violet, 0.02-1.5g of methyl red, and 0.02-2g of Congo red into a 1000mL beaker, add 1000mL of absolute ethanol, stir and dissolve to obtain the soaking solution;

[0018] 2. Cut the glass cellulose paper into strips and immerse them in the soaking solution, soak them in the dark for 20-30 minutes, take them out, dry the strips under vacuum at 45-60°C, and cut the test strips into 6*6mm after drying The test paper piece is pasted on one end of the PVC strip (the specification of the pvc strip is 50-100*6mm), that is, the Desu test paper

[0019] 3. Extractant: The extractant is mixed according to the ratio of ether: ethanol = 1:1.

[0020] Instructions:

[0021] Edible oil testing:

[0022] 1) Take 1mL oil sample in a centrifuge tube, add 2mL extractant, and shake repeatedly for 1 minute;

[0023] 2) Dip the test strip (the end with the test strip) into 1 for 2 seconds and take it out (or use a plastic dropper to take 1-3 dr...

Embodiment 2

[0025] 1. Soaking solution: Take 0.01-2g of methyl violet, 0.02-1.5g of methyl red, and 0.02-2g of Congo red into a 1000mL beaker, add 1000mL of absolute ethanol, stir and dissolve to obtain the soaking solution;

[0026] 2. Cut the glass cellulose paper into strips and immerse them in the soaking solution, soak them in the dark for 20-30 minutes, take them out, dry the strips under vacuum at 45-60°C, and cut the test strips into 6*6mm after drying The test paper piece is pasted on one end of the PVC strip (the specification of the pvc strip is 50-100*6mm), that is, the Desu test paper

[0027] 3. Extractant: The extractant is mixed according to the ratio of ether: ethanol = 1:1.

[0028] Instructions:

[0029] Solid and semi-solid sample detection:

[0030] 1) Take 1g sample in the sample preparation cup, add 3mL extractant, shake repeatedly for 2 minutes, and let stand for 1 minute;

[0031] 2) The test strip (the end with the test strip) is immersed in 1 for 2 seconds an...

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Abstract

The invention belongs to the field of food detection and especially relates to acid value rapid test paper and a detection method thereof. A production method of the rapid test paper comprises the following steps: (1) preparing a soak solution: putting 0.01-2g of methyl violet, 0.02-1.5 g of methyl red and 0.02-2g of Congo red in a 1000mL beaker, adding 1000mL of absolute ethyl alcohol, and fullystirring and dissolving to obtain the soak solution; and (2) taking glass cellulose paper, cutting the glass cellulose paper into strips, soaking the strips in the soak solution for 20-30 minutes in adark place, taking out the strips, drying the strips under a vacuum condition of 45-60 DEG C, cutting the dried test strips into test paper sheets of 6*6mm, and adhering the test paper sheets to oneends of PVC strips so as to obtain the rapid test paper. The method realizes one-step detection, does not need steps of titration, calculation and the like, greatly saves detection time and is especially suitable for on-site detection.

Description

technical field [0001] The invention belongs to the field of food detection, and in particular relates to an acid value rapid test paper and a detection method thereof. [0002] technical background [0003] In the existing GB5009.229-2016, three methods of cold solvent titration, potentiometric titration and hot ethanol titration are used to detect the acid value in food. Test kits, but regardless of the method and product, the result needs to be obtained by cumbersome titration and calculation, which requires high professionalism of the operator. At present, all parts of the country have strengthened the supervision of food, especially in the past two years, a quick inspection laboratory has been established in every farmers' market, and the daily on-site quick inspection reagents and instruments are used to quickly screen whether the food is qualified or not, and the acid value is also One of the supervised projects is that there is an urgent need for on-site testing pers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/80
CPCG01N21/80
Inventor 李美芬李鹏飞袁庆玲夏倩张家佳陈正丁
Owner 云南商测质量检验技术服务有限公司
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